Lawyer Sarah Sackman will be the Labour candidate in the Finchley and Golders Green constituency at the 2015 general election.
Ms Sackman was selected at a party meeting at Finchley Progressive Synagogue on Sunday.
Among the candidates she beat was Alon Or-Bach, who could have become the first Israeli to be a British MP.
Ms Sackman will challenge incumbent Tory MP Mike Freer, who won a 5,809 majority in 2010. The constituency has one of the highest proportions of Jewish residents in the country.
